500-230 Online Practice Questions and Answers

Which command is used to undo a change after issuing a commit command?

A. router# rollback configuration to -1

B. router(config# commit undo

C. router(config)# commit rollback

D. router# rollback configuration last 1

What command is used to manually generate a core dump to aid in troubleshooting a process?

A. context

B. dumpcore

C. exception

D. follow

How are labels exchanged between the AS'es in an Option B Layer-3 VPN solution?

A. Via an eBGP multihop connection between the Ingress PE's in each AS.

B. Via an eBGP multihop connection between a Route-Reflector in each AS.

C. There are no labels exchanged between the two AS'es.

D. Via an eBGP connection between the directly connected ASBR's, one in each AS.

Which is required on the CE router in an L3VPN solution?

A. Configure the PE-CE Routing protocol

B. Define the VPN by creating a VRF

C. Assign the PE facing interface to a VRF

D. Configure MPLS forwarding on the interface to the PE router

Which mode will shut down a process?

A. EXEC

B. ADMIN

C. CONFIG

D. ADMIN-CONFIG

What BGP address-families are used between the ASBRs in the different AS'es in an IPv4 Option C Layer3 VPN solution?

A. VPNv4 Unicast Only

B. IPv4 Umcast and VPNv4 Unicast

C. IPv4 Labeled-Unicast only

D. IPv4 Unicast and IPv4 Labeled-Unicast

Which command is similar to the Unix TOP command to display process utilization information?

A. show

B. trace processes

C. show process dynamic

D. monitor processes

What is currently required for eBGP sessions in IOS-XR that was not required in IOS?

A. Default MED values

B. Local-Preference values

C. Send Communities

D. Route-Filter In and Out

Which command is used to redistribute BGP into EIGRP for a Layer 3 VPN customer?

A. router(config-eigrp-af)# redistribute bgp 65001

B. router(config-eigrp-vrf-af)# redistribute bgp 65001

C. rouur(config-eigrp-vrf)# redistribute bgp 65001

D. router(config-eigrp)# redistribute bgp 65001

How many times are Layer 3 lookups performed on a packet transiting a CRS or ASR9k router?

A. Three times: in the ingress linecard, the fabric, and the egress linecard

B. Once: in the active RP/RSP

C. Once: in the ingress linecard

D. Twice: in the ingress linecard and again in the egress linecard

What information is unchanged after a process restart?

A. Job ID

B. Last Started

C. Respawn Count

D. Process ID

Which method or protocol exchanges label information?

A. MP-BGP

B. MOSPF

C. LSR

D. OSPFv3

How do you verify the label(s) used between the ASBRs in Option A Inter-AS L3VPN operation?

A. There are no labels used between the ASBRs

B. Verify the labels assigned by MP-BGP in the SHOW BGP VPNV4 UNICAST

C. Verify the labels assigned by MP-BGP in the SHOW CEF VRF output

D. Verify the labels assigned by LDP in the output of SHOW MPLS FORWARDING

How frequently does the WDSYSMON Watcher thread wake up to check counters?

A. every 500 msec

B. every 2 sec

C. every 200 msec

D. every 1 sec

Which command removes a user from configuration mode but keeps the user connected to the router?

A. clear line

B. clear session

C. clear commit

D. clear config session